Rotary screen.



I. S. CONVERSE.

ROTARY SCREEN.

APPLIOATION FILED. A-PR.17, 1912.

1,057,709. Patented Apr. 1, 1913.

W/TIVE88E8: A mm/mk 2% A 4 7 BY ATTORNEY COLUMBIA PLANOGRAPHCO.,WA5HINGTON..D- c

FREDERIG S. CONVERSE, OF BINGHAMTON, NEW YORK.

ROTARY SCREEN.

Specification of Letters Patent.

Patented Apr. 1,1913.

Application filed April 17, 1912. Serial No. 691,535.

To all whom it may c0ncem:

Be it known that I,-FRnDER1o S. OoN- VERSE, a citizen of the UnitedStates, residing at Binghamton, in the county of Broome and State of NewYork, have invented certain new and useful Improvements in R0- taryScreens, of which the following is a specification.

My invention relates to improvements in rotary screens for screening andsifting sand, coal and other screenable substances.

.The purpose of my device is to obviate and prevent the sand and otherfine sub stances being screened, from clinging to the interior sides ofthe screen.

Vith this object in view my invention consists in certain novel featuresof con struction and arrangement of parts as will be hereinafter moreparticularly set forth I in the claims, reference being had to the accompanying drawings in which Figure 1 is an end elevation of my device,Fig. 2 is a perspective view of a part of my device, Fig. 3 is a planview of a part of my device, Fig. 4 is a front elevation in perspectiveof a part of my device and Fig. 5 is a front elevation of a part of mydevice.

The same reference characters denote like parts in each of the severalfigures of the drawings.

In carrying out my invention, I provide an ordinary frame B on which ismounted the usual rotary screen, represented by G. On the screen body OI have the sectional screen coverings D. On the outside of the sectionsof the screen covering I mount the bands E, having loops 4, 4, 4, 4,etc. The ends of said bands E terminate in the loops 5, 5. These loopsare formed by the bands E having their ends turned back and fastened tothe sectional covering by means of the nut bolts 6, 6, which hold theband ends firmly to the sections.

The covering for my rotary screen is made up of two sections. On theframe B I mount a frame A, as shown in Fig. 1, formed of the uprights w,:0, and the cross piece 3 Mounted on the support 00 of frame A I havethe knocker F turning on the pivot 7. This knocker is provided with thetwo arms 8. Between the arms 8 I have the roller 9, composed of metal orother heavy substance. The frame A and the knocker F are so located thatthe roller 9 tracks with the bands E and the loops 4, 4, 4, 4. IVith theturning of the screen O the knocker F is raised up and down by thepassing of the looped band, and as it falls to the band surface in thespace between the loops, the blow thus struck causes a vibratory motionof the screen cover which causes the sand and other substance gatheredthereon to fall to the bottom of the interior of the screen and preventsa steady accumulation of substances on the meshes of the screen. Therapidity of this knock or movement of the knocker F depends of courseupon the rapidity of the movement of the screen and the fall of theknocker. I

Having thus described my invention, what I claim as new and for which Idesire Letters Patent is as follows:

1. In a rotary screen in combination a rotatable screen frame, acylindrical screen mounted on said frame, a band surrounding saidscreen, said band being provided with loops forming raised projectionsofappreciable height, and a pivoted knocker arranged tangentially tosaid screen at its top and provided with a knocking roller of a diameterapproximately equal to the height of said loops, whereby upon rotationof the screen, the knocking roller acts both tangentially and radiallyto vibrate the screen, substantially as described.

. 2. In a rotary screen in combination a rotatable screen frame acylindrical screen made up of two or more sections mounted on saidframe, band sections surrounding said screen sections and coextensive incircumferential length therewith, said band being provided with loops,forming raised projections of appreciable height, and a pivoted knockerarranged tangentially to said screen at its top and provided with aknocking roller of a diameter approximatelyequal to the height of saidloops whereby the knocking roller acts both tangentially and radially tovibrate the screen, substantially as described.

In testimony whereof I have affixed my signature in presence of twowitnesses.

FREDERIC S. CONVERSE. Witnesses:

S. A. VALENTINE, F. E. CAMPBELL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

' Washington, D. C.

